More from the G-20: Sound weapon

Yesterday in the late afternoon and evening, a march was broken up by police with tear gas and sound cannons (see below). Some of the marchers regrouped and kept going; they were met by police firing rubber bullets and tear gas and beating marchers with batons, according to direct on-the-ground information we have, corroborated by press releases and published reports. The marchers were able to break through the police lines and continue on their way.

Here's what a sound cannon sounds like, from a brief recording last night on the streets of Pittsburgh by Paul McCarrier, a Portland man protesting there:

And last night, in the Oakland neighborhood of Pittsburgh, police were heavily armed and moving around in vehicles that we probably could have used in Iraq, instead of those canvas-sided Humvees. The photo's by Paul McCarrier as well.

And here's a bizarre video of an "arrest" by what appear to be members of the military in an unmarked car, taking a person off the street with his backpack still on and no handcuffs or preliminary search. (Video from G20media)